Ok. This sounds great for easy developing. But when I'm hosting this I'm not a mitmproxy. I want to act like a normal server/endpoint for API A.
- https://www.npmjs.com/package/http-proxy
- https://www.npmjs.com/package/connect
- https://www.npmjs.com/package/harmon
If you don't want to act like a proxy, you're going to approach this like a normal web applications that does HTTP requests using whatever HTTP client your framework of choice uses.